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<html lang="en">

<head>
  <meta charset="UTF-8">
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  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <script>
    // let score = +prompt('请输入您的高考分数：')
    // if (score > 700) {
    //   alert('恭喜上岸')
    // }
    // if else双分支语句
    let uname = prompt('请输入您的用户名：')
    let psw = +prompt('请输入密码：')
    if (uname === 'li' && psw === 123) {
      alert('登录成功')
    } else {
      alert('登录失败')
    }
  </script>
</body>

</html>